pub fn brute_single_xor(input: Vec<u8>) -> (u8, Vec<u8>) {
    let (mut lowest_score, mut lowest_val, mut lowest_key) = (f64::INFINITY, Vec::new(), 0);
    for key in 0..256 {
        let cipher_text = xor::xor_byte(&input, key as u8);
        let score = score::score_text(&cipher_text);
        if score < lowest_score {
            lowest_score = score;
            lowest_val = cipher_text.to_vec();
            lowest_key = key;
        }
    }
    (lowest_key, lowest_val) // Change to: (lowest_key as u8, lowest_val) and it works fine
}